Differential Protection
Mostrando 13-24 de 209 artigos, teses e dissertações.
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13. Application of numerical methods, derivatives theory and Monte Carlo simulation in evaluating BM&F BOVESPA's POP (Protected and Participative Investment)
This article presents a practical case in which two of the most efficient numerical procedures developed for derivative analysis are applied to evaluate the POP (Investment Protection with Participation), a structured operation created by São Paulo Stock Exchange - BM&FBOVESPA. The first procedure solves the differential equation through the use of implicit
Pesquisa Operacional. Publicado em: 2011-08
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14. Isolation of a cotton NADP (H) oxidade homologue induced by drought stress.
O objetivo deste estudo foi identificar e isolar genes diferencialmente expressos em quatro genótipos de algodão (Gossypium hirsutum L.) que apresentam respostas distintas ao déficit hídrico. Os genótipos estudados foram Siokra L-23, Stoneville 506, CS 50 e T-1521. As mudanças fisiológicas, morfológicas e de desenvolvimento que as plantas apresentam
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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15. Isolation of a cotton NADP(H) oxidase homologue induced by drought stress.
The aim of this study was to identify and isolate genes that are differentially expressed in four selected cotton (Gossypium hirsutum L.) genotypes contrasting according to their tolerance to water deficit. The genotypes studied were Siokra L-23, Stoneville 506, CS 50 and T-1521. Physiological, morphological and developmental changes that confer drought tole
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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16. O trabalho informal perante o sistema de previdência social, à luz da teoria comunicacional do direito / O trabalho informal perante o sistema de previdência social, à luz da teoria comunicacional do direito / The informal work in the social security system, from the viewpoint of the communicational theory of law / The informal work in the social security system, from the viewpoint of the communicational theory of law
This research has the scope of analyzing the informal work, very common in the current Brazilian scenario, into the current social insurance system, starting from the communicative conception of law. Indeed, the informality of employment relationship proves to be a major challenge for contemporary states, notably in the social insurance sphere, in which the
Publicado em: 2011
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17. Sistema híbrido inteligente para o monitoramento e proteção de transformadores de potência / Hybrid intelligent system for monitoring and protection of power transformers
Este trabalho apresenta um conjunto de métodos para a proteção e o monitoramento de transformadores de potência baseado em sistemas inteligentes e na aplicação das transformadas de Clarke e Wavelet. A abordagem inteligente utilizada permite analisar a condição operativa dos transformadores de potência e detectar a ocorrência de defeito interno, dis
Publicado em: 2010
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18. Evaluación de la degradación por termoxidación de termoplásticos empleados en aplicaciones agrícolas
Polyolefins as polypropylene are used in agricultural applications for plant assistance and protection. However, their massive consumption is causing environmental problems. In this study, polypropylene and polypropylene blends with starch and biodegradable polymers such as Mater-Bi that could be used in this agricultural endeavor, were exposed to several th
Rem: Revista Escola de Minas. Publicado em: 2009-12
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19. El nacimiento de la acreditación internacional
This article discusses the main guidelines and global trends for international accreditation as it views this process as an expression of globalization and internationalization of higher education. It focuses on the characteristics of these new processes of evaluation and accreditation in the region. As part of the growing complexity of higher education, it
Avaliação: Revista da Avaliação da Educação Superior (Campinas). Publicado em: 2009-07
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20. Mathematical models for numerical simulations of environmental impact scenarios in the Balsas River / Modelagens matematicas para simulações computacionais de impacto ambiental no Rio Balsas
Worldwide, the growing concern with environmental problems has happened quite rapidly, with special emphasis, in many cases, as regards sweet water resources; humanity has acted as if such resources were endless, and today the situation has changed into a very diferent reality. In this general picture, this work proposes the modelling of the evolutive behavi
Publicado em: 2009
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21. Heat and mass transfer in two-phase flow around airfoils with aeronautical anti-ice systems. / Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos.
It is required to prevent ice accretion on wings and horizontal stabilizers because it may cause aerodynamic performance degradation, weight increase, flight control difficulties and, in critical cases, may lead to operational safety margins reduction. When aircraft flies through clouds containnig supercooled water droplets, which are in metastable equilibri
Publicado em: 2009
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22. Síntese e caracterização de peneiras moleculares mesoporosas do tipo MCM-41 e AlMCM-41 a partir de fontes alternativas de sílica e de alumínio
The mesoporous molecular sieves of MCM-41 and AlMCM-41 type are considered as promising support for metal in the refining processes of petroleum-based materials as catalysts and adsorbents for environmental protection. In this work the molecular sieves MCM-41 and AlMCM-41 were synthesized by replacing the source of silica conventionally used, for quartz, an
Publicado em: 2009
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23. Proteção diferencial de transformadores trifásicos utilizando a transformada wavelet
A qualidade e a continuidade do fornecimento de energia elétrica aos consumidores são fatores muito importantes quando da avaliação da eficiência de um sistema elétrico de potência. Nesse contexto, os transformadores são equipamentos muito importantes e demandam especial atenção quando do projeto do esquema de proteção. Apesar do crescente desenv
Publicado em: 2009
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24. Aspects of spatial pattern, habitat association and herbivory density-dependent of Calophyllum brasiliense Camb. (Clusiaceae) in restinga alta florest, Ilha do Cardoso, Cananéia. SP. Brazil / Aspectos da distribuição espacial, associação com hábitat e herbivoria dependente da densidade de Calophyllum brasiliense Camb. (Clusiaceae) em restinga alta na Ilha do Cardoso, Cananéia, SP, Brasil
Several theories, including different factors and mechanisms, have been postulated to explain the high tree species coexistence in tropics, which remains an unsolved question that continues to pose a challenge to plant ecologists. Population-level tree dynamics studies contribute to a better understanding of the processes acting on community-level. The aim o
Publicado em: 2009